Uncle Wormsley is a grey, decaying old man, who dedicates his life to the care of his only friend, a monstrous crab called Crabsley who lives in a dungeon under his house.

Across town lives Johnnie Goodington, a rich boy who has everything money could buy except one thing — a giant monstrous crab.

One Christmas, Johnnie’s father strikes a deal with the mysterious and shadowy Crab Catchers. Johnnie shall have his Giant crab, but dark forces have been unleashed, and who can tell where this will end?